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Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Salmonid species in the Pacific Northwest continue to decline despite management efforts to mitigate the effects of development of the Columbia River basin and power system. Altered fish species diversity and changes in the aquatic habitat have created the need for research to determine the status, life history, and habitat requirements of at risk More...
Publisher: USGS | Science Center: Alaska Science Center (ASC, Anchorage) | Format: URL
alaska.usgs.gov — This web resource is about polar bear research at the Alaska Science Center. It points to web links related to population dynamics, which includes abundance and vital rates, polar bear status, population size, distribution, radiotelemetry use to allocate harvests among polar bear stocks, effects of hypothetical oil spills on polar bears, pelagic More...
Publisher: USGS | Science Center: Pacific Island Ecosystems Research Center (PIERC, Honolulu) | Format: URL
biology.usgs.gov — Scientists in Hawaii are using genetic and molecular techniques to better screen Hawaiian forest birds for chronic avian malaria infections. Chronically-infected birds may hold the key to identifying disease resistance genes, and may be good candidates for forest bird restoration efforts.
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
fresc.usgs.gov — Conservation Genetics of Shorebirds uses molecular techniques to describe genetic structure and diversity in North American shorebirds (order: Charadriiformes) to facilitate population maintenance and recovery of these migratory birds.
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The objective of this study is to determine the approach pattern and passage locations of juvenile salmonids to assist in planning decisions relative to a behavioral guidance structure at The Dalles Dam. This will be accomplished by comparing estimates of fish, spill and sluiceway passage efficiencies of fish with different approach patterns. The More...
Publisher: USGS | Science Center: Northern Rocky Mountain Science Center (NRMSC, Bozeman) | Format: URL
www.nrmsc.usgs.gov — In 1975 grizzly bears were listed as threatened under the Endangered Species Act. This project estimates the grizzly bear population size, using sign surveys and systematic hair snag stations to obtain an estimate of the number of grizzly bears in the Northern Continental Divide Ecosystem (NCDE) in northwest Montana. Another objective is to More...
Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — Radio transmitters, passively induce transponder (PIT) tags, visual surveys, and other methods and techniques are being evaluated to determine the habitat use and life history characteristics of the giant garter snake (Thamnophis gigas), a species endemic to Central Valley wetlands and federally listed as threatened.
Publisher: NBII | Format: URL
gapanalysis.nbii.gov — Gap Analysis Program (GAP) is a scientific means for assessing what native animal and plant species are being protected. The goal of Gap Analysis is to keep common species common by identifying those species and plant communities that are not adequately represented in existing conservation lands.
Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — Conservation Genetics researchers at the USGS San Diego Field Station are currently using genetic techniques to investigate the population structure of several species of concern and to investigate links between Southern California geography and patterns of genetic diversity across different species groups. This resource also links to other More...
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
fresc.usgs.gov — The Conservation Genetics Laboratory of the Forest and Rangeland Ecosystem Science Center provides information about its research, publications, mission, partners, contact information, field sampling protocol, and related links.
Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — This issues overview and its resources deal with the spread of nonnative grasses in the Sonoran desert of Arizona has increased the risk of devastating fires by ignited fuel. The saguaro cactuses and desert tortoises have suffered catastrophic population losses as a result of these fires fueled by nonnative grasses. Read more about nonnative More...
Publisher: USGS (San Diego Field Station) | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — The Pacific iguanas of the Fijian and Tongan archipelagos are a biogeographic enigma in that their closest relatives are found only in the New World, separated by 8,000 km of ocean. The Pacific iguanas have been dramatically affected by human activities; two species were eaten to extinction after human arrival in the Pacific some 2,800 years ago. More...
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U.S. Geological Survey